Law enforcement officers search for a gunman after a shooting at Lone Star College Tuesday, Jan. 22, 2013, in Houston.

Photo: James Nielsen, Chronicle

Law enforcement officers search for a gunman after a shooting at...

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A photo provided by the Harris County Sheriffs Office shows Carlton Berry. Authorities have charged 22-year-old Berry with two counts of aggravated assault with a deadly weapon. They say Berry and another man were involved in an argument that escalated into gunfire at Lone Star College, a Houston-area community college. (AP Photo/Harris County Sheriffs Office)

Photo: HOPD

A photo provided by the Harris County Sheriffs Office shows...

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Lone Star College students sit on the street corner near Aldine-Westfield after they were evacuated from the campus following a shooting at the north Harris County school Tuesday, Jan. 22, 2013, in Houston.

Photo: Brett Coomer, Houston Chronicle

Lone Star College students sit on the street corner near...

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SWAT officers search the Lone Star College parking lots and buildings after a shooting which left several people injured Tuesday, Jan. 22, 2013, in Houston.

Photo: James Nielsen, Chronicle

SWAT officers search the Lone Star College parking lots and...

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Dr. Richard Carpenter, Lone Star College System chancellor, left, and Maj. Armando Tello, of the Harris County Sheriff's Department, address the public.

Photo: Brett Coomer, Houston Chronicle

Dr. Richard Carpenter, Lone Star College System chancellor, left,...

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Lone Star College students sit near a parking lot after they were evacuated from the campus following a shooting at the north Harris County school Tuesday, Jan. 22, 2013, in Houston.

Photo: Brett Coomer, Houston Chronicle

Lone Star College students sit near a parking lot after they were...

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Lone Star College student Kendrick Ferguson waits for his ride at one of the schools entrances after a shooting which left several people injured Tuesday, Jan. 22, 2013, in Houston.

Photo: James Nielsen, Chronicle

Lone Star College student Kendrick Ferguson waits for his ride at...

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A law enforcement officer directs traffic as a schools busses are allowed back at Nimitz High School and Nimitz Ninth Grade campus were on lock down after a shooting at Lone Star College Tuesday, Jan. 22, 2013, in Houston.

Photo: James Nielsen, Chronicle

A law enforcement officer directs traffic as a schools busses are...

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Lone Star College students walk away from the college after they were evacuated from the campus following a shooting at the north Harris County school Tuesday, Jan. 22, 2013, in Houston.

Photo: Brett Coomer, Houston Chronicle

Lone Star College students walk away from the college after they...

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A law enforcement officer checks a vehicles trunk before leaving the Lone Star College after a shooting which left several people injured Tuesday, Jan. 22, 2013, in Houston.

Photo: James Nielsen, Chronicle

A law enforcement officer checks a vehicles trunk before leaving...

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A woman embraces a Lone Star College student after he was evacuated from the campus following a shooting at the north Harris County school Tuesday, Jan. 22, 2013, in Houston. ( Brett Coomer / Houston Chronicle )

Photo: Brett Coomer, Houston Chronicle

A woman embraces a Lone Star College student after he was evacuated...

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A sheriff's deputy walks along the road toward the Lone Star College campus following a shooting at the north Harris County school Tuesday, Jan. 22, 2013, in Houston.

That was the catalyst for an argument that erupted into gunfire at a Lone Star College campus, sending four people to the hospital - three with bullet wounds - locking the campus down for several hours Tuesday afternoon, bringing about 140 sheriff's units to the school and spurring international news coverage.

On Thursday, authorities charged a second man, 22-year-old Trey Foster, with aggravated assault in the shooting at the community college's North Harris campus, according to court records. The incident apparently started when another person "bumped into" Foster, who has not been arrested, court records state.

More Information

Court records allege that Foster was the shooter. Authorities earlier charged Carlton Berry, 22, a friend of Foster's, in connection with the incident.

Harris County prosecutors and sheriff's officials stressed that the investigation continues to unfold after a chaotic shooting scene that erupted about 12:20 p.m. Tuesday on the campus at 2700 W. W. Thorne. Authorities said they believe only one weapon was involved, but exactly what happened has not been determined. The gun has not been recovered.

"I don't know who was holding the weapon," said Assistant Harris County District Attorney Alison Baimbridge. "They're still trying to interview all of the witnesses to determine where the weapon was and who was holding it."

At least 10 shots fired

Berry, who initially denied any involvement in the shooting, later admitted to investigators that he'd been with Foster, authorities said.

Berry told investigators that a man, later identified as 25-year-old Jody Neal, had "bumped" into Foster earlier in the day, and it had escalated into an argument, court records state. Neal is taking GED classes at the school.

Whether Neal and Foster knew each other is unknown.

About a half-hour later, Berry told authorities, the pair saw Neal again and Foster had been telling him they were going to fight. When their argument resumed near the doorway to the school's academic building, Foster began shooting, according to court records.

At least 10 shots were fired, authorities said. Bobby Cliburn, a 55-year-old maintenance worker on campus, was caught in the crossfire and found near the academic building, shot in the leg. Neal, who was wounded in the leg and abdomen, collapsed in the student library, where he ran after the shooting.

Both have been hospitalized and are expected to survive. A student in a classroom also was taken to an area hospital after her blood pressure rose too high during the shooting.

Berry, who was struck by a bullet in the leg and hospitalized, is charged with two counts of aggravated assault with a deadly weapon. How Berry was shot is also unclear, but authorities earlier indicated it was accidental and self-inflicted.

Initially, Neal identified Berry, who was being carried past him on a stretcher at the scene, as the shooter, court records state. A day later, Berry said the shooter was wearing an Atlanta Falcons cap. Security video from the school earlier in the day shows Foster, who was with Berry, wearing the cap, according to an arrest affidavit.

Identified in lineup

In a photo lineup on Wednesday, Neal also identified Foster as the man who shot him, according to court records.

Officials with the Harris County Sheriff's Office declined to comment on any new developments in the investigation.

They also withheld comment on the status of Berry's criminal charges in the case. Under Texas law, he could remain charged in the shootings if he was a "party" to the offense.

The Rev. Robert Gilmore Sr., founder of Real Urban Ministries and Real Urban Counselors, described the shooting as senseless Thursday afternoon.

"It's totally irrational," said Gilmore, whose wife works at the college. "Chuck Berry did a song where he said, 'Don't step on my blue suede shoes,' but they weren't talking about killing people."